Filters: Tags: Eldorado Mine (X)
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Quartz stringers in footwall of vein, Eldorado Mine, near bottom of shaft. Stringers are parallel and at angles to the vein but cross the vertical cleavage of the country rock. Hanging wall marked by later shear. Sierra County, California. 1924. Plate 12-A, in U.S.Geological Survey Professional paper 172. 1932.
Categories: Image;
Tags: Eldorado Mine,
Ferguson, H.G. Collection,
Mines,
Photographers,
Sierra County, California,
Quartz displaced by minor fault that does not cut the footwall, Eldorado Mine, upper tunnel on bullion vine. Sierra County, California. 1924. Plate 17-A, in U.S.Geological Survey Professional paper 172. 1932.
Categories: Image;
Tags: Eldorado Mine,
Ferguson, H.G. Collection,
Mines,
Photographers,
Sierra County, California,
Vein with lower strand showing crinkly banding and strand above containing fragments of altered wall rock, Eldorado Mine, adit level. Along hanging wall in right hand upper corner is breccia containing quartz fragments in a matrix of carbonate and mariposite. Sierra County, California. 1924. Plate 19-B, in U.S.Geological Survey Professional paper 172. 1932
Categories: Image;
Tags: Eldorado Mine,
Ferguson, H.G. Collection,
Mines,
Photographers,
Sierra County, California,
Breccia containing quartz cemented by fine-grained quartz, Eldorado Mine, adit level. Breccia lies along hanging wall of vein but extends down into the vein along small fissures. Sierra County, California. 1924. Plate 14-A, in U.S.Geological Survey Professional paper 172. 1932.
Categories: Image;
Tags: Eldorado Mine,
Ferguson, H.G. Collection,
Mines,
Photographers,
Sierra County, California,
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